Method for protecting a security module and arrangement for...

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Protection at a particular protocol layer

Reexamination Certificate

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C713S001000, C713S002000, C713S189000, C713S193000, C713S152000, C713S300000, C714S022000, C714S721000, C710S108000, C710S108000, C710S108000, C710S010000, C709S218000

Reexamination Certificate

active

06952777

ABSTRACT:
A method for protecting a security module includes the steps of monitoring proper insertion of the module on a device motherboard with first, second and third function units, erasing sensitive data due to an improper use or a replacement of the module with the second function unit, inhibiting the functionality of the module with the third function unit during a replacement of the security module, re-initializing the previously erased, sensitive data following proper use or replacement of the security module, and re-commissioning by enabling the function units of the security module. An arrangement implementation of the method has an unplugged status detection unit that has a circuit for resettable self-holding of a status indicator, the self-holding being triggered when the voltage level on a test voltage line deviates from a predetermined potential. A processor connected to the other function units and is programmed to identify and modify the status of the security module.

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“Information Based Indicia Program Postal Security Device Specification”, United States Postal Service, Jun. 13, 1996.

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